I remember when I asked the same question when we got our winter whites
...the consensus of opinion seemed to be that they could be given the same food and we use Harry Hamster for all of ours. We also give millet and they seem to love the tiny pieces.
One thing though - our Syrians get fresh veggies about five times a week - I'm much more careful with the ww's - they get a tiny piece each about twice a week - seems to work as none of them have had diarrhoea and they all seem healthy.
Does this mean what I think it means, Jane??? :P